Fixing sockets must not be used for lifting but exclusively for fixing. Fixing sockets are electro-galvanised bichromated.

Permissible loads F are defined for concrete compressive strength of 25 MPa. To avoid premature failure of the socket by blow-out of the concrete, the socket has to be placed with minimum distances, from the edge and between sockets.

For straight pulling N, the minimum edge distance is CN and the minimum distance between 2 sockets is S. For shear force V, the minimum edge distance is CV and the minimum distance between 2 sockets is S. The minimum thickness of the panel should be H (minimum concrete cover of 25 mm). When the force is a combination of shear force V and straight pull N, the permissible load F should respect the following formula:

√(V2+N2) ≤ perm. F

Fixing sockets must be used with metric thread screw. They must be screwed on at least one time the diameter and no more than E.